Sawdust bueneb



June 24, 1930. K A c, KENNEDY 1,767,138

sAWbUsT BURNER y Filed March 25. 1929 2 Sheets-sheet 1 gmmtoz June 24,v 1930. A. c. KENNEDY sAwDUsT BURNERv Filed March 25. 1929 2 Sheets-Sheet 2 Patented June 24, 1930 means* UNITED STATES PATENT carica ALLAN C. KENNEDY, KELSO, WASHINGTON sAWnUsT BURNER,

Application med March 25, 1929; serial no. 349,760.

The present invention relates to improvements in domestic burners for house heating wherein the waste from sawmills such as sawdust, wood waste and the like is utilized as the fuel. j K

One of the important objects of the invention is to provide a sawdust burner attachment for heating stoves wherein thev same includes an improved grate construction, the latter being provided with draft openings to aid in the combustion of the fuel.

Another important object resides in the provision of-an angular chute for disposition wit-hin the burner and' for further cooperation with the outer edge of the grate for facilitating the feeding of the sawdust to the hre-box portion of the burner, the

lower portion of the vertically disposedV angular chute being also formed with draft openings to aid in the combustion of the fuel.

Another object is to provide a sawdust burner attachment for stoveswherein the parts are so arranged as to permit the-same to be readily andeasily assembled or disassembled and to further permit the adjustment of the grate as well as the angular chute.

A still further object is to provide a sawdust burner attachment of the above-mentioned character which 1s simple 1n con-l struction, inexpensive, strong and durable and further well adapted for thev purposes for which it is designed.

Other objects and advantages of the invention will become apparent from the following description when taken in connection with the accompanying drawings.

In theaceompanying drawings wherein like reference characters indicate corresponding parts throughout the same:

Figure l is afront elevation of the sawdust burner embodying my invention showing the manner in which the same is attached to a convenientheating stove.

Figure 2 is a` side' elevation, the) burner* being shown in section.

Figure 3 is a horizontal sectiontakeniap-V` proximately on the line 3 3 of Figure 2L perspective view 'of conventional construction, the opening that leads to the ash. pit beingdesignated at 2. My improved saw dust burner comprises a substantially L-shaped casing denoted Vgenerally by the reference character 3,`the same being substantially rectangular in cross section. The base portion of the L-shaped casing has its free end extending into the opening 2 of the stoveV l and a flange 4: extends around the side of the outer end portion of the base of theL-shaped casing for engagement with the outer face of the front side of' the stove adjacent the opening@ to limit the inward sliding movement of the casing with respect to the ash pit of the stove. To-

` further support the casing in a rigid' manner, there is provided the brace 5 that is securedat one end of the inner side of the upstanding portion 6 of the L-shaped casing and the other end of this brace is secured to thek front of the stove kin the manner as more clearly disclosed in Figure l:2 of the drawings.'

A funnel-shaped hopper 7 is formed at' its lower discharge end ywith the reduced neck portion 8 that is removably fitted in the upper'end of the leg or upstanding portion 6 of the L-shapedcasing 3, and a removable lid 9 is provided for the open top of the hopper 7. The casing 3 is preferably constructed of cast iron while the hopper may be constructed of sheet metal although it is to be understood that I do not wish to limit myself to the particular materiall from which the casing and the hopper are formed.

The outer side of the leg portion 6 of the L-shaped casing 3 is formed adjacent its lower end with the draft opening 10 and a movable closure 11 is associated with this draft opening. Below the draft opening, there is arranged in the outer side of the leg portion 6 a clean-out opening that is normally closed by means of the hinged door shown at 12.

The base portion of the L-shaped casing 3 constitutes what I term the lire box or combustion chamber 13 and removably arranged within the bottom of the ire box or combustion chamber is the cast iron grate shown at 14 in Figure 5. The inner end of this grate is formed with a downwardly extending lip 15 while a transverse rib 16 is formed on the underside of the outer end portion of the grate 14 for a purpose to be presently described. The outer end portion of the grate 14 is formed with a series of air holes 17 as also clearly shown in Figure 5.

ledge-shaped blocks such as are shown at 18 in Figure 6 are adapted to have their flat bottom faces resting on the bottom of the casing 3 and the inclined upper edges of these blocks are formed with spaced notches 19 for receiving the rib 16. |This construction provides a means whereby the outer end portion of the grate 14 may be vertically adjusted with respect to the bottom of the fire box 13 and this grate 14 is of such a length as to terminate a suitable distance inwardly of the outer side of the leg portion 6 of the casing as suggested very clearly in Figure 2.

A stop 20 extends upwardly from the bottom of the inner end portion of the fire-box for engagement with the depending lip 15 to limit the inward sliding movement of the grate 14 in the manner as also clearly shown in Figure 2.

Adapted for cooperation with the grate 14 is the angular chute denoted generally by the numeral 21 and which chute is clearly illustrated in Figure 4 of the drawings. This chute is arranged in a vertical manner in the lower outer portion of the angular casing 3, the upper edge of the upper section 22 being beveled as indicated at 23 to lit snugly against the inner face of the front wall of the leg portion 6 while the lower section 24 of the angular chute 21 is formed at its free lower edge with the notched segments 25, the outer edge portion of the grate 14 being adapted toengage in any one of the notches 26 formed in the segments in the manner as clearly shown in Figure 2.

The lower section 24 of the angular chute 21 is further provided adjacent its lower edge with spaced air openings 27.

The lower edge of the angular chute 21 is spaced approximately one-quarter of an inch from the outer edge of the grate 14. The notched segments 25 cooperate with the outer or adjacent edge of the grate 14 for adjusting the angular chute 21 whereby to regulate the flow of the sawdust from the hopper 7 to the fire-box or combustion chamber 13. The coarser the sawdust is, the faster it will feed or crowd down on the fire. By raising the grate and the chute 21, the feeding of the sawdust to the lire-box may be regulated.

To start the lire, the hopper 7 is removed from the upper open end of the leg portion of the L-shaped casing 3, andpieces of paper are pushed downwardly into the fire-box 13 and the same is ignited after which a small quantity of saw dust is sprinkled over the burning paper to start the ,burning of the fuel after which the hopper is placed in position and is filled upk with the sawdust. The sawdust will by gravity be delivered to the fire-box 13 where the same will burn and form a honeycomb and with a very little draft, a gas like iiame will enter the stove 1 for eifectively heat-ing the room in which the stove is located.

It will thus be seen from the foregoing description, that I have provided a sawdust burner attachment for stoves that will at all times be positive and eflicientin its operation and due to its simplicity, the parts may be properly adjusted whenever necessary and may furthermore be assembled or disassembled.

lVhile I have shown the preferred embodiment of my invention, it is to be understood that minor changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit'of the invention or the scope of the appended claims.

What is claimed is:

1. A burner of the class described comprising a casing including a fire-box, the inner end of the lire-box being open, a grate arranged in the bottom of the fire-box and provided with air holes in the outer end portion thereof, means for adjustably spacing the outer end portion of the grate with respect to the bottom of the fire-box, the outer end of the fire-box being provided with a draft opening, and means within the outer end portion of the lire-box for delivering fuel onto the grate, said means including an inclined Chute, the lower edge thereof terminating adjacent the outer edge of the grate, the upper edge of the chute adapted to engage with the outer side of the casing, and means carried by the lower edge of the chute for engagement with the adjacent edge of the grate to support the latter or to support the chute in position in the casing.

2. A burneryof the class described comprising a casing including a lire-box, the inner end of the lire-box being open a grate arranged in the bottom of the lire-box and provided with air holes in the outer end portion thereof, means for adjustably spacing the outer end portion ofthe grate with respect to the bottom of the lire-box, the outer end of the fire-box being provided with a draft opening, and means within the outer end portion of the fire-box for delivering fuel onto the grate, said means including an inclined chute, the lower edge thereof terminating adjacent the outer edge of the grate, the upper edge of the chute adapted to engage with the outer side of the casing, and means carried by the lower edge of the chute for engagement with the adjacent edge Aof the grate to support the latter or to support the chute in position in the casing, said lastmentioned means comprising a notched segment.

3. A burner of the class described comprising in combination with a heating stove, of a substantially L-shaped casing open at its respective ends, the free end of the base j ortion of the casing adapted to extend into the ash pit of the stove, the base portion of the L-shaped casing comprising a fire-box, a fuel hopper supported in the upper end of the leg portion of the L-shaped casing, a grate arranged within the bottom of the firebox and provided with air holes in the outer end portion thereof, means for adjustably supporting the outer end portion of the grate with respect to the bottom of the firebox, the outer side of the leg portion of the L-shaped casing being provided with a draft opening adjacent the lower end thereof, and means within the outer lower portion of the casing for feeding the fuel onto the apertured grate.

4. A burner of the class described comprising in combination with a heating stove, of a substantially L-shaped casing open at its respective ends, the free end of the base portion of the casing adapted to extend into the ash pit of the stove, the base portion of the L-shaped casing comprising a fire-box, a fuel hopper supported in the upper end of the leg portion of theL-shaped casing, a grate arranged within the bottom of the fire-box and provided with air holes in the outer' end portion thereof, means for adjustably supporting the outer end portion of the grate with respect to the bottom of the fire-box, the outer side of the leg portion of the L-shaped casing being provided with a draft opening adjacent the lower end thereof, and means within the outer lower portion of the casing for feeding the fuel onto the apertured grate, said means comprising an inclined chute, the upper edge thereof engaging with the outer side of the intermediate portion of the leg of the casing, and means carried by the lower edge portion of the chute for engagement with the outer edge of the grate to support the chute in position.

5. A burner of the class described comprising in combination with a heating stove,

of a substantially L-shaped casing open at its respective ends, the free end of the base portion of the casing adapted to extend into the ash pit of the stove, the base portion of the L-shaped casing comprising a fire-box, a fuel hopper supported in the upper end of the leg portion of the l.shaped casing, a grate arranged within t-hel bottom of the nre-box and provided with air holes in the outer end portion thereof, means for adjustably supporting the outer end portion of the grate with respect to the bottom of the fire-box, the outer side of the leg portion of the L-shaped casing being provided with a draft opening adjacent the lower end thereof, and means within the outer lower portion of the casing for feeding the fuel onto the apertured grate said means comprising` an inclined chute, the upper edge thereof engaging with the outer side of the intermediate portion of the leg of the casing, and means carried by the lower edge portion of the chute for engagement with the outer edge of the grate to support the chute in position, said last-mentioned means comprising a notched segment.

6. A burner of the class described comprising in combination with a heating stove, of a substantially l.-shaped casing open at its respective ends, the free end of the base portion of the casing adapted to extend into the ash pit of the stove, the base portion of the L-shaped casing comprising a fire-box, a fuel hopper supported in the upper end of the leg portion of the L-shaped casing, a grate arranged within the bottom of the lirebox and provided with air holes in the outer end portion thereof, means for adjustably supporting the outer end portion of the grate with respect to the bottom of the rebox, the outer side of the leg portion of the L-shapedcasing being provided with a draft opening adjacent the lower end thereof, and means within the outer lower portion of the casing for feeding the fuel onto the apertured grate of the hre-box, the outer side of the leg portion of the Lshaped casing being provided with a draft opening adjacent the lower end thereof, and means within the outer lower portion of the casing for feeding the fuel onto the apertured grate, said means comprising an inclined chute, the upper edge thereof engaging with the outer side of the intermediate portion of the leg of the casing, and means carried bythe lower edge portion of the chute for engagement with the outer edge of the grate to support the chute in position, the lower edge portion of the chute being formed with air holes.

In testimony whereof I aliix my signature.

ALLAN C. KENNEDY. 

